Loom for weaving.



A. G. KOEGHLIN. LODM POP. WEAVING. APPLIOATIONI'ILEDJAN.1B!1913.

Patented Sept. 16, 1913.

lwvamon A.G. KoEcHLm ATTORNEY.

COLUMBI PLANOGRAPH C0.,WASHINGTON, Dv C.

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ALBERT GEOIRG KOECI-ILIN, OF BASEL, SWITZERLAND, ASSIGNOR T0 SPINNEREI &WEBEREI STEINEN A. G2, OF STEINEN, GERMANY.

LOOIVI r011 wEAvnvG.

To all whom it may concern Be it known that I, ALBERT GEoRe Koncn- LIN,a citizen of i the Swiss Republic, and resident of Basel, Switzerland,have invented new and useful Improvements in Looms for Weaving, of whichthe following is a full, clear, and exact specification.

In all looms, whether power looms or hand looms, or whether designed forthe weaving of animal or vegetable textile fibers, it is a commonpractice to divide the warp between the yarn beam and the harness inorder to prevent the warp threads becoming entangled or fractured. Inthe case of most looms there are used for this purpose stationary roundor flat lease rods or slats which are inserted into the warpthreads soas to divide them into two bands or sets. Such stationary rods or slats,however, possess the disadvantage that they do not perfectly divide thewarp threads and frequently cause their breakage, owing to the fact thatthe warp threads adhere to them and to each other and obviously must rubagainst said rods or slats to no inconsiderable extent and are therebyweakened and not infrequently torn. In order to obviate thesedisadvantages, it has already been proposed to employ movable drivenlease rods or bars or other automatically reciprocated lease members,but

all these automatically driven lease members, though better dividing thewarp, have necessarily the disadvantage of a more or less greatfrictional cooperation with the warp threads. Now, in order to obviatethis drawback, I employ according to the present invention for dividingthe warp a plurality of freely rotatable rollers arranged in contactwith each other and so actuated by means of an automatic drive that theyare caused to roll one upon another as well as on the stretched threads.By this means the division of the warp is not only effected much moreefficiently than hitherto, but the said division takes place without theslightest friction between the dividers and the warp threads so that therubbing and the resulting weakening of the latter are completelyobviated and the fracture of the threads is so far as possible avoided.These warp dividing rollers can be arranged in the warp between the yarnbeam and the back-bearer, or between the latter and the tackle orharness. In

Specification of Letters Patent.

Patented Sept. 16, 1913.

Application filed January 18, 1913. Serial No. 742,889.

the first case they are movably mounted in direction, in such a mannerthat they can freely follow the gradual inward movement of the warp pathdue to the decrease of diameter of the yarn beam. The drive can beeffected from any suitable shaft of the loom and either continuously orintermittently; in the latter case at more or less larger intervals oftime. For increasing their movability the dividing rollers may bemounted in ball-bearings.

The accompanying drawing shows two modes of carrying out the invention.

In the said drawing: Figure 1 is a diagrammatic cross sectional view ofa loom fitted with a warp dividing device of the type first abovementioned. Fig. 2 is a similar view of a loom illustrating theapplication thereto of the second type of dividing device, and Figs. 3and 4t illustrate modifications of details of the device.

Referring first to Fig. 1, there are arranged in the warp between theyarn beam (1 and the back-bearer Z) two rotatable dividing rollers 0, clhaving end pivots which are freely movable in bearing forks e on lateralcarrying arms f. These two rollers, which are preferably tubular, are incontact with one another and with the threads of the divided warp. Thecarrying arms f are mounted upon a. rocking shaft 9 which isperiodically oscillated, through the medium of an arm h, by a cam 21keyed upon the treadle eccentric shaft 7' in order to move the rollersa, (Z to-andfro along the warp threads. By this movement the rollersinsure the division of the warp; they roll against one another inopposite directions and upon the warp threads without friction, so thatduring this motion of the rollers, which effects the division of thewarp, the threads are carefully preserved.

Figs. 3 and 4 illustrate a suitable mode of mounting the dividingrollers in their fork bearings e. In each fork 6 there is movablymounted-on balls a slide-block m in which the end pins or pivots a ofthe rollers are mounted in ball hearings in the known manner. By thismethod of mounting the movability of the dividing rollers, both asregards rectilinear and rotary I110- tion is considerably increased.

The construction shown in Fig. 2 differs from that first describedessentially in that in this case the dividing rollers 0, d are arrangedbetween the back-bearer and the harness 70 and above one another insteadof horizontally adjacent to one another, the said rollers a and d beingoscillated in an approximately horizontal direction by the upwardlydirected forked arms The actuation of the dividing rollers can 7 10 beeffected from any shaft of the loom through the medium of eccentrics,cams or other smtable devlces. The movement of the rollers upon the warpcan take place j at every pick or only at every second,

7 third or li e pick and the rollers, instead of moving in anapproximately straight line, can be caused to move through a circular orother path. lVith dense warp more than two dividing rollers may be madeuse of, if desired.-

3'0 device comprising two freely rotatable dividing rollers in the warp,arranged in contact with one another, and automatic means for causingsaid dividing rollers to rollfrictionless one on the other in oppositedirec- 3-5 tions as Well as on the stretched warp threads.

3.. In looms for weaving, a warp-dividing device comprising two freelyrotatable dior viding rollers in the warp, arranged side by side incontact with one another, an auto- 40 matic periodically operating meansfor causing said dividing rollers to roll frictionless one on the otherand on the'stretched c warp threads. V f 4. In looms for weaving, awarp-dividing device comprising two freely rotatabledi- 1 viding rollersarranged in the warp between device comprising two freely rotatable di-I viding rollers, ball bearings for the same,

movable carrying members for said ball bearings and automatic meansconnected with said carrying members for positively causing the rollerstomovealong the warp so as to roll frictionlessone upon the other V andon the stretched warp threads, substantially as described. 7 s V Inwitness whereof I have hereunto signed my name this 30th day ofDecember, 1912,

in the presence of two subscribing witnesses.

ALBERT GEORG KoEoHLIN.

Witnesses GEO. Girrono, AMAND BITTER.

- Gopies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents,

Washington, D. C.

